A man walks into a pet shop and says to the owner, “Do your Shih Tzu dogs breed well?”
The owner says,”Sure they do.”
After a minute, the man says, with a grin, “What about your bull dogs?”
“Yes they breed well, too.”
The man, happy with this, buys both. The owner asks, “Why do you need to know that anyway?”
The man replies, “I’m going to go home and breed a bullshit!”